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jlechner |
This directory contains the FastJar package, which is not part of GCC but
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shipped with GCC as convenience.
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=======
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FastJar 0.90
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12/6/1999
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=======
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FastJar is an attempt at creating a feature-for-feature copy of Sun's JDK's
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'jar' command. Sun's jar (or Blackdown's for that matter) is written entirely
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in Java which makes it dog slow. Since FastJar is written in C, it can create
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the same .jar file as Sun's tool in a fraction of the time. On my system,
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Sun's jar takes 50 seconds to create a 10MB jar file, while FastJar only takes
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a little over a second.
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The reason I wrote fastjar is that building .jar files is a regular process
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of the build where I work. The way we have it setup, you have to re-create
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the .jar file everytime you want to test it out, which is about every 5 minutes
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when I'm busy coding. The .jar file wasn't -that- big, but it did take about
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30 seconds to be made, and watching all the garbage collection messages was
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pretty irritating as well. I probably wasted a half-hour a day watching
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Sun's jar tool chug along. By writing the program in C, I spend much less time
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banging my head against the monitor waiting for the build to finish. Yay!
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FastJar has been tested on Solaris and Linux 2.2.x systems and nothing else.
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It should compile/run without any problems on either system, provided you have
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zlib installed.
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Please mail any bug reports to burnsbr@ucs.orst.edu.
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If you use FastJar and want me to add the rest of the features, send me mail
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(toast@users.sourceforge.net). I'll be much more likely to put more work into this
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if I know other people find it useful other than me.
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As always, this not being a final release, bugs may exist. I test each
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release pretty well, but I can always miss things...
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Compression will slow things down quite a bit. A 10MB jar file takes about
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1 second on my machine without compression, and 9 seconds with it. If you
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want fastjar to be fast, use the -0 (zero, not O) flag to turn off compression.
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Supported flags:
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--------------------------
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-c | create a new archive
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-v | verbose output
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-f | specify archive file name
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-m | specify existing manifest file
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-M | don't create manifest
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-0 | store only
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-C | change to dir
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-t | list contents
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-x | extract contents
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Unsupported flags:
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----------------------------
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-u | update exisiting archive
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If you use the "unsupported" flags, nothing bad will happen, but then again
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nothing will happen at all.
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Unsupported features (in this release):
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---------------------------------------------
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* updating
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* full manifest support (?)
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Order or features for the future:
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--------------------------------------------
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* archive updating
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* full manifest support
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* filtering
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* dependency checking
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===========================================================================
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http://fastjar.sourceforge.net
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toast@users.sourceforge.net
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